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His first patent was in 1909, inventing a door lock that turned lights on and off. [1] At the time, Schlage was a citizen of Germany residing in Berkeley, California. [2] In 1919, Schlage patented a door knob which, when pushed up, locked the door. [3] [4] This was succeeded by a door knob incorporating a push-button lock, patented in 1924. [5]
Schlage (/ ʃ l eɪ ɡ / SHLAYG) [1] [2] is an American lock manufacturer founded in 1920 by Walter Schlage. Schlage was headquartered in San Francisco from its inception until it relocated to Colorado Springs, Colorado, in 1997. Schlage also produces high-security key and cylinder lines Primus, Everest, and Everest Primus XP.
A door may be held open with a device such as a door holder [1] or door closer, [2] which can automatically release the door upon the sound of a fire alarm and protect a building in the event of a fire. An ultraviolet door handle attendant can be installed to sterilize the existing handle. Automatic door handle sanitisers are used mainly in ...
Kentuck Knob, also known as the Hagan House, is a house in rural Stewart Township near the village of Chalkhill in Fayette County, Pennsylvania, United States. Designed by the American architect Frank Lloyd Wright , it is 45 miles (72 km) southeast of Pittsburgh . [ 3 ]
Signal Knob is the northern peak of Massanutten Mountain in the Ridge and Valley Appalachians with an elevation of 2,106 feet (642 m). [1] It is located in George Washington National Forest in Shenandoah County and Warren County in Virginia. The peak offers expansive views into the northern Shenandoah Valley and the town of Strasburg, Virginia.